Joshua Tree National Park in September
In September, Joshua Tree National Park averages a high of 97°F and a low of 69°F, with 0.3 inches of precipitation (rain plus melted snow). About 165,000 people visit, the 10th busiest of 12 (moderate). Days are 12 hours 21 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 97° / 69°F
- Precipitation
- 0.3in
- Snow
- –in
- Daylight
- 12h 21m
- Visitors
- 165,000
- Crowds
- Moderate
Best months for weather and crowds instead: November (busy).
Higher or lower in the park, expect a different picture: Desert Resorts Rgnl AP, CA at -118 ft averages a September high of 102°F and a low of 68°F.
Weather 1991–2020 averages at Twentynine Palms, CA, 16.5 miles from the park's center, 1,975 ft. Second station lower down: Desert Resorts Rgnl AP, CA, -118 ft, 22.2 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Lake Mead National Recreation Area | 97° / 72° | Very busy | Very hot |
| Death Valley National Park | 108° / 79° | Moderate | Very hot |
| Channel Islands National Park | 78° / 60° | Busy | Mild |
| Sequoia National Park | 70° / 39° | Busy | Mild |
| Kings Canyon National Park | 70° / 39° | Busy | Mild |
Closures, reservations and alerts: Joshua Tree National Park on nps.gov
All twelve months at Joshua Tree · National parks to visit in September